1998 Grand Cherokee 4.0

[electrolover]

Originally Posted By: greenfordtruck
Some report good analysis using Rotella T or T5 10w30. Either with a purolator filter should by fine. As for stickers, Advance Auto Parts has them.


+1. T5 would be great for that

 

[bullwinkle]

Originally Posted By: eljefino
There's a sale on amazon on peak 10w40. What I'd run if it's pouring out the rear main seal.

Also check if the longer FL1a filter fits.
The FL-1A will fit fine, I've got the Puro Pure One equivalent PL30001 on mine, no clearance problems. I would still stick with a silicone ADBV, though, and the FL-400S is still bigger than the OEM Mopar filter.

 

[Zaedock]

I wouldn't bother with a 10W30. Pick a 5W30 and run with it. I've literally beaten my trail Jeep to heck and back, including Moab, all on SOPUS syn 5W30's.

I would grab 6qts of Quaker State Ultimate Durability with a Fram super-duper whatever they call it extended interval filter and change it out. Good to go until early summer.


The pan gasket and rear main are pretty easy on Mom's ZJ. I recommend the one piece oil pan gasket from Felpro. Fire and forget on them. They have the cool crush washers so you can't overtighten them (I've done a bunch on 2.5/4.0L/258, with no leaks).